131935866 has 16 divisors (see below), whose sum is σ = 275344704. Its totient is φ = 42066464.

The previous prime is 131935813. The next prime is 131935871. The reversal of 131935866 is 668539131.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477891 + ... + 478166.

It is an arithmetic number, because the mean of its divisors is an integer number (17209044).

Almost surely, 2^131935866 is an apocalyptic number.

131935866 is an abundant number, since it is smaller than the sum of its proper divisors (143408838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131935866 is a wasteful number, since it uses less digits than its factorization.

131935866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956085.

The product of its digits is 116640, while the sum is 42.

The square root of 131935866 is about 11486.3338798766. Note that the first 3 decimals coincide. The cubic root of 131935866 is about 509.0818621286.

The spelling of 131935866 in words is "one hundred thirty-one million, nine hundred thirty-five thousand, eight hundred sixty-six".